Tilting mechanism for concentrating-tables



W. A. BUTCHART. TILTINVG MECHANISM FOR CONCENTRATING TABLES.

APPL ICATION FILED MAY 24, 191,91

Patented July fig, mm

2 SHEETS-SHEET I.

l/I/l/E/VTOR B TCM ATTORNEY W. A. BUTCHART. TILTING MECHANISM FOR CONCENTRATING TABLES.

' APPLICATIONFILED MAY 24, 1919. L&5,662w

Patented July fi M200] 2 SHEETSSHEET 2.

mpv-v,

it eas es.

nert- WILLIAM a. new:er-rarer, or nnnvnn, cetonano.

.TILTING MECHANISM FOR GUNClEI l'llRdlTINGr-TABLEES,

h'pecification of Letters Patent.

liatenterl duly t3, tiittth Application filed. 24,-, 1919. serial No. 299.43%.

, 1! 'o ell whom it may] comm g n lie it known that l, VV'LLIJAM A. Boronan'r, a citizen of the United. States, residing};

at Denver, in the county of Denver and filt ate of Colorado, have invented certain character which will change the transverse f inclination of the table uniformly along its entlre length and whlch lncludes aloclnng mechanlsin for securing ts partsni thelr adjusted positions.

With this object in view, my improved mechanism providesla pivotal connection to one end of a pair of pivotally mounted beams upon which the table deck rests and extending transversely thereunder, so that hy raising or lowering the pivoted ends the transverse inclination of thetahle deck can he variedto accelerate, or retard the trans verse flow oi material under treatment.

lhe tilting mechanism consists of a pair of pinions mounted for rotation in unison in driving en asement with racks to which the hea ms are pivotally.attached, and an appliunee. wliieh by a simple adjustment locltsthe pinions against rotation and thereby secures the racks in their adjusted positions.

. il zlaving thus briefly explained the nature oi: my invention I will now proceed to describe the same in detail with reference to the accompanying drawings in the various views of which like characters oi reiterence designate corresponding parts, and in whichy l igure'l represents a plan view in outline of a concentrating table to which my invention is applied;

, his. 2, an enlarged fragmentary elevation of the supporting and adjusting, mechanisms;

hip. 23, a further enlarged section taken 011 the line 3--3, Fig. 2;

l'iig. l, an enlarged transverse section on the line 4-4:, Fig. 2, and

Fig. 5, a section taken. on the line 55, F1 9;. 2.

deterring to the drawings, the reference character 2 designates the beams upon which the concentrating table deck 8 is supported and which extend transversely and parallelly beneath the same.

The beams are mounted by means of trunnions 4i to oscillate about a central. transverse axis upon standards 5 and they are provided at their extremities with channeled hearings;- tor the support of the concentrating table deck.

The table shown in outline in Fig. l is to this end equipped with tour short rails 8 extending; parallel. to its longitudinal axis adjacent its ends and resting; loosely within the hearings '2' as shown in Fig. at.

The adjusting mechanism which as hereinheitore explained is applied at one end of the parallel beams, consists of two standards 9 and i wlnch have axlally ahned openings tor the rotary support of a tubular shaft 12.

Pinionsl8 secured upon the shaft by setscrews l-fi have flanges l opposite correspondingly formed tliaces on the inner sides ot the standards, to. provide guideways for rack-bars 1G whichat their upper ends are pivotally attached to lugs 17 projecting,-

from one oi? the enc s oithe two beams.

The rack teeth, are formed along one of the sides of longitudinal slots 18 in the bars, within which the plnlons extend and the hars thus cooperate with the flanges on the pinion and the faces on the standards to constantly nniintain the racks in their cooperative positions.

it hand-wheel 1.9 mounted on the hollow shaft and preferably having: handles 19"" at equal distances along; its rim, provides a convenient means for the manual rotation oi? the shaft.

illhe locking appliance of the mechanism consists of a rod 20 which extends loosely through the hollow shaft and projects beyond the ends thereof. A. nut 21.011 one of tle screw-threaded ends of the rod hears upon a cupped washer 22 which lies against the corresponding standard over the end of the hollow shatth'and another similarly recessed washer 23 which occupies a corresponding position upon the outside of the other standard, and has aspiral-camtace which cooperates with a corresponding face on a cam rotatably supported upon the endoi the rod. projecting through and beyond the washer.

A. nut 25 screwed upon the end of the rod, holds the face oi the cam in engagement with the cam face of the washer, and a dowel 526 on the standard 10 occupying a recess in the washer 23, holds the latter against rotation.

and pinions The cam 24 has a laterally extending handle 24 to facilitate the rotary movement of its spiral-cam face upon the corresponding face of thewasher 23.

It will be seen that when the cam is in its normal position in which its spiral-cam face lies loosely against that of the washer, the tubular shaft is free to rotate and that when itsrotation is effected through the medium of the hand-wheel 19, the coopeative engagement of the pinions with the racks on the bars 16 will cause the latter to move up or downwardly. v

The movement of the rack bars compels the beams 2 to move about their pivotal aXes With the result that the transverse inclination of the table deck supported upon the bearings at their extremities is changed accordingly.

To look the parts in their adjusted positions the cam 24: is turned upon the washer 23 in the direction of the inclination of its spiral-cam face, thereby increasing the effective thickness of the washer lever face, and forcing the standards 9 to spring slightly from their natural position and thus clamp- 1ng1y engage the rack-bars between the flanges 15 of the pinions 13 and corresponding flanges on standardst) thereby preventing rotation of the pinions and vertical movement of the rack bars.

It will be understood that my tilting mechanism may be attached to a concentrating table deck otherwise than by pivotal connection to two supporting beams, without departing from the spirit of my invention.

Having thus described my. invention what I claim and desire to secure by LettersPatcut is:

1.' Adjusting mechanism of the character described, comprising in combination with a tiltably supported element, rack-bars pivotally attached thereto, bendable standards, pinions rotatably supported thereon in operative engagement with racks on the bars, means to rotate the pinions, and locking mechanism acting upon the standards to cause them to frictionally oppose the cooperative movements of the plnions and the racks. V

2. Adjusting mechanism of the character described comprising in combination with a tiltably supported element, rack-bars pivotally attached thereto, standards, pinions rotatively supported thereon in operative ways for the bars, and locking means acting upon the standards to clamp the ruel-Is be tween their faces and the flanges of the respective pinions.

4:. Adjusting mechanism of the character described comprising in combination with a tiltably supported element, raek'lmrs pirotally attached thereto, bendable standards. a hollow shaft rotatably supported thereon. pinions on the shaft meshing with racks on the bars and having flanges cooperating with faces on the standards to form guideways for the bars, a rod extending through the shaft and. having a head, bearing on one of the standards, a cam-member fixed with relation to the other standard, and a rotary cam-member on the rod, cooperating with the other member to bend the standards.

Adjusting mechanism of the character described comprising in combination with a tiltably supported element, rack-burs pi\- otally attached thereto, standards. a shaft rotatably supported thereon, pinions on the shaft meshing with racks on the bars and mechanism adapted to oppose rotation ol" the shaft by a clamping engagement of the standards and relatively movable parts.

(5. Adjusting mechanism of the character described comprising in combination with a tiltably supported element. inelosed racks pivotally attached thereto, bendable standards, pinions rotatably mounted on the standards in operative engagement with the racks and having flanges opposed to fat-es on the standards to form guide ways for the racks, and mechanism acting upon the standards to clamp the racks between their faces and the flanges of the respective pinions.

In testimony whereof I have afiixed my signature.

WILLIAM A. BUTUHA R 

